Schedule II, Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Allowance for Bad Debts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Jan. 1		$ 12	$ 15	$ 13
Charged to costs and expenses		8	8	11
Charged to other accounts	[1]	2	2	1
Deductions from reserves	[2]	(12)	(13)	(10)
Balance at Dec. 31		10	12	15
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Jan. 1		0	2	0
Charged to costs and expenses		6	10	2
Charged to other accounts		0	0	0
Deductions from reserves	[3]	6	12	0
Balance at Dec. 31		$ 0	$ 0	$ 2

[1] Recovery of amounts previously written-off.

[2] Deductions related primarily to bad debt write-offs

[3] Primarily reversals of valuation allowances on completed tax credit sales and reductions of valuation allowances for items forecasted to be used prior to expiration.